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| Flat compression simulation analysis of porous grid homogenization model |
| Received:December 04, 2020 Revised:March 02, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20201204003 |
| KeyWord:porous grid unit cell periodic boundary condition homogenization flat compression analysis |
| Author | Institution |
| 盛亚鹏 |
郑州大学 机械与动力工程学院, 郑州 |
| 段玥晨 |
郑州大学 机械与动力工程学院, 郑州 |
| 谢鑫 |
郑州大学 机械与动力工程学院, 郑州 |
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| Abstract: |
| In order to study the application of the homogenization method in a porous grid structure, a three-dimensional periodic boundary condition for finite element analysis is established in the grid cell scale.ABAQUS is used as the simulation platform to analyze the flat compression simulation performance of the grid cell model with periodic boundary conditions.The reliability of the boundary conditions is verified by comparing the simulation results and the experimental results in the literature.Based on the homogenization theory, the equation of equilibrium for a grid unit cell is established, and the homogenization model of the grid is obtained.Through comparing the flat compression results of the homogenization model and the detailed model, the accuracy of grid homogenization method applied to the grid structure is verified.Finally, the flat compression simulation performance of the detailed model and the homogenization model is compared and analyzed.The results show that the calculation time of the homogenization model is far less than that of the detailed model, and the calculation error of the homogenization model obviously decreases with the increase of the porous grid layers.In addition, the homogenization model can replace the detailed model for energy absorption analysis. |
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